Man there is over 2000 cryptocurrencies in the market and I don't see why anyone should be adding to that huge number, but whatever,,. I think maybe they don't want to follow the same route as others, they just want to do their thing I guess. It's not a must that they should have a coin of their own, not even Coinbase that has been around since 2012 has its own coin or do they?? Cause I don't know. And another thing you have to know is that Binance exchange is a huge exchange and you can't be comparing them with rest.